I use them in combination with La Bella Super Steps 5 string set to complete the 7 string bass guitar set; add 20 and 28 from "Pyramid". They sound very good and long lasting, and fits my La Bella set perfectly. This string is long scale and fits my instrument very good. No any issues with rust or broken string during 3-4 month of usage.
This is a very good quality string with a great price/perfomance ratio for a great price and backed up by excellent Thomann warranty and customer service, very happy with this purchase and would recommend.